Sinter grate

ABSTRACT

Apparatus for the drying, calcining and sintering of ores, minerals and similar materials. The apparatus is comprised of a grate which is arranged to be drawn by chains, to be supported by bearing rollers and is laterally bounded by sideplates positioned between an upper slide bar and a lower slide bar and mechanically connected to the grate plate, and sealing elements placed between the upper and lower slide bars. The lower slide bars and the sealing elements are arranged to be supported by common supporting plates secured to a supporting frame.

United States Patent 56] References Cited UNITED STATES PATENTS 6/1963McDowell et al.......

[72] lnventors Fritz Muller Knapsack nr. Cologne Winfried SchmidtKendenich nr. Cologne Hugo Werner, Hermulheim nr. Cologne 30945773,172,936 Germany [21] Appl. No. 854,391

3/1965 Koontz.............

Primary Examiner-John J. Camb Attorney-Connolly and l-lutz [22] FiledSept. 2, 1969 [45] Patented Mar. 30, 1971 [73] Assignee KnapsackAktiengesellschaft Knapsaek bei Cologne, Germa [32] Priority Sept. 111968 Germany ABSTRACT: Apparatus for the d of ores, minerals and similarma prised of a grate which is arran be supported by bearing rollersideplates positioned between slide bar and mechanically co sealingelements placed betw bars. The lower slide bars and the sealin ranged tobe supported by common su to a supporting frame.

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In a conventional sintering grate of the type described above, thesealing elements are so arranged that the lower end thereof be directlysupported by a supporting frame and that the upper end thereof providesupport for a slide bar connected to the sealing elements throughinterposed adapters, which in turn are mechanically connected to thesaid sealing elements by means of a tongue-and-groove joint. The lowerslide bar is arranged so as to rest on a spring-mounted support and tobe spaced from the sealing elements. Considerable abrasion of the slidebar which is caused by friction between the lower slide bar itself andthe sideplates, makes it necessary for the lower slide bar to beexchanged at certain intervals of time. This exchange has been effectedheretofore from inside the sintering grate, which is rather difficultand complicated 'work bearing in mind that it is necessary for thesealing elements to be disassembled together with the upper slide barand together with the adapters placed between the said upper slide barand said sealing elements. The disassembly of these intermeshingstructural parts with their considerable weight is even substantiallymore difficult to carry out than the complicated exchange of the lowerslide bar from inside the grate. In addition thereto, the resilientsupport provided for the lower slide bar is soon rendered useless, i.e.rendered rigid, by dust depositing below the slide bar.

The object of the present invention is to provide a grate for thedrying, calcining and sintering of ores, minerals or similar materials,of the type described hereinabove which, however, is free from thedeficiencies reported and designed so as to have a readily accessibleand readily replaceable lower slide bar. To this effect, the presentinvention provides for the lower slide bars and the sealing elements tobe supported by a supporting plate common to them and secured to asupporting frame. The sintering grate so designed fully satisfies therequirements set forth above and enables more particularly a new slidebar to be readily substituted for a worn lower slide bar. To this end,it is merely necessary first to disassembly the upper slide bar and thenthe sealing elements as a separate structural part. Following this, thelower slide bar is readily aecessible from the outside. I

In the sintering grate of the present invention, it is advantageous forthe ends of the supporting plates extended to reach behind the slidebars to be angled upwardly. The supporting plates are preferablyarranged to be screwed firstly to the supporting frame and secondly tothe sealing elements. For the lower slide bar it is sufficient to beloosely supported by the supporting plates and to be held in contactwith the angled ends of these plates.

The invention also provides for the lower and upper ends of the sealingelements to be angled away from the grate plate, whereby the angledupper ends provide support for and receive the upper slide bar. Theupper slide bar has a ledge secured to it, which is arranged so as to belevel with and so as to be spaced from the side plates, and effectivelyprevents those plates from tilting over.

An exemplary representation of the apparatus of the present invention isshown diagrammatically in the accompanying drawing, which moreparticularly is a cross-sectional view of a sintering grate used for thedrying, calcining and sintering of ores, minerals or similar materials,e.g. crude phosphate pellets.

As can be seen, a holder 2 arranged to be supported by a U- shaped steelor iron section 3 is secured to frame 1 by means of a ledge 4. Mountedon holder 2 is a support 5 receiving end 7 of shaft 6 and mounted onshaft end 7 is bearing roller 8 carrying grate plate 9, through chainbolt 10 and chain elements 11. Grate plate 9 is arranged to be drawn bychain elements 1 1.

Grate plate 9 is bounded at its two sides by side plates 14 which arepositioned between upper slide bar 12 and lower slide bar 13 andmechanically connected to grate plate 9. The side plates 14 which arearranged to be driven or drawn by chain elements 11 and bolt 10 slide onlower slide bar 13. Sealing elements 15 are placed between the upperslide bar 12 and the lower slide bar 13. The sealing elements 15 have anarm or ledge 16 fastened to their lower ends, and an arm or ledge 17fastened to their upper ends. The lower slide bar 13 and the lower arms16 connectedto sealing elements 15 are arranged to be supported byplates 18 which are common to them. The plates 18 in turn are supportedby holders 5 and 19 forming part of the supporting frame. Supportingplates 18, i.e., their ends 20 extended to reach behind the lower slidebar 13, are angled upwardly, and screwed firstly to holders 5 and 19 bymeans of screws 21 and 22, and secondly to scaling elements 15 by meansof screw 23. For the lower slide bar 13, it is sufficient to be looselysupported by supporting plates 18 and to be held in contact with theirangled ends 20. Its own weight and the force exerted by side plates 14definitely prevent slide bar 13 from leaving its position.

The upper slide bar 12 is arranged to be screwed to the upper arm 17 ofsealing elements 15 by means of screw 24. To prevent sideplates 14 fromtilting over, the upper slide bar 12 has a ledge or shoulder 25 which isarranged level with sideplates 14. Above upper slide bar 12 is the archabove the sintering grate (not shown in the drawing).

The lower slide bar 13 is very easy to replace or exchange in thesintering grate of the present invention. To this end, it is necessaryfirst to unscrew member 24 and remove upper slide bar 12 as a separatestructural part. Following this, it is necessary to loose screw 23 forremoval of sealing elements 15. After this easy and rapid work, thelower slide bar 13 is found to be accessible from the outside.Followingthe exchange of lower slide bar 13, it is necessary for the sealingelements 15 to be reinstalled and for screw 23 to be tightened. Theupper slide bar 12 is positioned and secured to the upper arm 17 ofsealing element 15, by means of screw 24.

Needless to say the invention is in no way limited to the exemplaryrepresenation shown in the accompanying drawing, and admits of variousmodifications without departing from its scope.

We claim:

1. An apparatus for the drying, calcining and sintering of ores,minerals and similar materials, e.g. crude phosphate pellets, comprisinga grate, arranged to be drawn by grate chains, to be supported byhearing rollers and laterally bounded by sideplates, the sideplatesbeing positioned between an upper slide bar and a lower slide bar andmechanically connected to the grate plate, and sealing elements placedbetween the upper and lower slide bars, wherein the lower slide bars andthe sealing elements are arranged to be supported by supporting platescommon to them and secured to a supporting frame.

2. The apparatus as claimed in claim 1, wherein the supporting plateshave upwardly angled ends extended to reach behind the lower slide bars.

3. The apparatus as claimed in claim 1, wherein the supporting platesare arranged to be screwed firstly to the supporting frame and secondlyto the sealing elements.

4. The apparatus as claimed in claim 1, wherein the lower slide bars arearranged to be loosely supported by the supporting plates and to be heldin contact with the angled ends of the supporting plates.

5. The apparatus as claimed in claim 1, wherein the lower and upper endsof the scaling elements are arranged to be angled away from the grateplate, whereby the angled upper ends provide support for the upper slidebars.

6. The apparatus as claimed in claim 1, wherein the upper slide bar hasa ledge secured to it, the ledge being arranged so as to be level withand so as to be spaced from the sideplates.

1. An apparatus for the drying, calcining and sintering of ores,minerals and similar materials, e.g. crude phosphate pellets, comprisinga grate, arranged to be drawn by grate chains, to be supported bybearing rollers and laterally bounded by sideplates, the sideplatesbeing positioned between an upper slide bar and a lower slide bar andmechanically connected to the grate plate, and sealing elements placedbetween the upper and lower slide bars, wherein the lower slide bars andthe sealing elements are arranged to be supported by supporting platescommon to them and secured to a supporting frame.
 2. The apparatus asclaimed in claim 1, wherein the supporting plates have upwardly angledends extended to reach behind the lower slide bars.
 3. The apparatus asclaimed in claim 1, wherein the supporting plates are arranged to bescrewed firstly to the supporting frame and secondly to the sealingelements.
 4. The apparatus as claimed in claim 1, wherein the lowerslide bars are arranged to be loosely supported by the supporting platesand to be held in contact with the angled ends of the supporting plates.5. The apparatus as claimed in claim 1, wherein the lower and upper endsof the sealing elements are arranged to be angled away from the grateplate, whereby the angled upper ends provide support for the upper slidebars.
 6. The apparatus as claimed in claim 1, wherein the upper slidebar has a ledge secured to it, the ledge being arranged so as to belevel with and so as to be spaced from the sideplates.